Structural organization on a microscopic scale for (a) the positive control (long-lasting formula with wax and volatile oil) (b) the new formula based on the mixture of jojoba esters (75/25% butter A/butter B w/w) and (c) the negative control (formula that migrates very quickly into the eyelids without wax, butter or volatile oil). The optical microscopy images were obtained under polarized light with cross-polarizers (±45°) at 20 °C and with magnifications of x10 (top microscopic images) and x40 (bottom microscopic images).